show("id1","hidden");
function show(ID1, ID2){
    console.log(ID1+" " +ID2);

    $("#"+ID1).hover(function(){
        //鼠标进入
        $("#"+ID2).css("opacity","1");
        $("#"+ID2).css("transition-duration","0s");


    },function(){
        //鼠标离开
        $("#"+ID2).css("cursor","pointer");
        $("#"+ID2).css("transition","opacity 0s");
        $("#"+ID2).css("opacity","0");

    });
}